This is an 80,000 square foot factory complex in Waterbury's South End. The company dammed a small stream to form a pond, the waters of which cascade over the dam and run beneath the building in a concrete channel. The interior of the main three-story building has completely collapsed. The attached two-story structure has fared better. Here is a blog post with photos: http://nassahegon.blogspot.com/2016/03/former-risdon-manufacturing-company.html